Diffraction peaks are expected for the $(110),(200),$ and $(211)$ planes in a BCC metal, such as iron.What would be the expected $20$ peak locations, in degrees, for these three planes if iron has a lattice constant of $0\mathrm{.}2866$ nm$?$ Assume n$=1$ and the monochromatic radiation has a wavelength of $0\mathrm{.}1542$ nm$.(6$ points$)$